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1, maintenance of the pump should pay attention to several major parts:
A, the front seal ring, the rear seal ring: When the seal ring wear to a certain extent, to be replaced.
B, Rolling bearings: When long-term operation, bearing wear to a certain extent, to be replaced.
C, mechanical seal: mechanical seal in the case of no leakage, the general should not open the inspection. If there is any serious leakage at the lower end of the bearing body, the mechanical seal should be disassembled. Assembly and disassembly of mechanical seals, you must gently, pay attention to the cleaning with the surface to protect the static ring and moving the mirror ring is strictly prohibited percussion collision. Leakage due to mechanical seal is mainly due to the friction mirror mirror hair to. The repair method: the friction end face can be polished to restore the mirror. Another reason for the leakage of mechanical seals is the improper installation of the O-rings or the aging of the seals. In this case, the O-ring needs to be replaced for reassembly.
2, the pump disassembly order:
A, remove the motor or prolapse coupling.
B, remove the bearing assembly, check the radial clearance of the impeller and the front ring, check the impeller nut loose.
C, remove the impeller nut, pull the impeller, check the radial clearance of the impeller and the rear seal ring.
D, Loosen the set screw of the mechanical seal, pull out the moving ring part of the mechanical seal, check the fit of the moving and stationary ring end faces, and check the sealing condition of the O-ring.
E, unscrew the set screws of the coupling and pull out the coupling.
F, remove the bearing cover, remove the pump shaft and bearings.
G, the installation can be assembled in the reverse order.
Self-priming pump is characterized by simple structure, reliable, durable. In the normal case of pumps, usually do not need to often open the maintenance. Exclusion can be given at any time after the discovery of the fault.